Rotary take-up.



G. B. OSTERHOUT.

ROTARY TAKE-uP.

APPLICATION FILED SEPT- 30, 1913.

Patented Apr. 6, 19ML entran erases earner ernten.

GJRRET B. OSTERHUT, OF PRVIDENCE, RECIBE ESLAND, ASSIGNOR T0 WLLCOX &

' GIBBS SEWNGr MAGHNE C0., 0F NEW YORK, N. Y., A CORPORATEQN OF NEW YORK.

no'rsnr renner.

nien-ssa Specicaton of Letters Patent.

Patented Apr. 6, 1915.

application area september so', i913. serial no. 792,675.

To ali whom', it may concern.

Be it known that l, GARRET B. @STEM-rom?, of Providence, Rhede island, have invented a new and useful improvement in Rotary TakelUps, which invention is fully set forth in the following specification.

rThis invention relates to improvements in rotary take-ups, andy more especially to the general type of take-up shown in patent to A. A. Merritt, No. 1,041,715, dated @ctober 15, 1912, designed especially for use upon a sewing machine ofthe character shown in patent to A.. A. Merritt, No. 1,041,652, dated October 15, 1912. A A

The object `generally is to provide a takeup capable of close and precise adjustment in its action upon the thread, and more particularly to attain just the proper tightening of the needle threads at the instant in the stitch-forming cycle when loops in said threads are slipping oli' the Ypoints of the loopers. This and other advantages are attained by the structure of this invention, the at vpresent preferred embodiment of which is illustrated in the accompanying drawings, wherein- A Figure l is a vertical sectional view through a portion of a sewing machine, including a take-up ofthe present invention turned to such position as to exert its minimum action on the thread; Fig. 2 is a similar view but with the take-up turned to such position as to exert its maximum action on the thread; Fig. 3 is a face view of the take-up partly broken away and sectioned; Fig. 4 is a side view with the outline of the take-up cams dotted; and Fig. 5 comprises a. detail view of a com ensating spring and a sectional view on 'ne 5 -5 of Fig. 2. Figs. 1 to 4 inclusive are on an enlarged scale, while Fig. 5 is drawn to actual size.

10 is a part of the bridge portion of the frame-work of a sewing machine of the type illustrated in the aforesaid Merritt Patent No. 1,041,652; 11 is a -bracket mounted on said bridge portion and supporting a thread guide 12 and tension disks 13 for a crossthread 14. A thread guide 15, tension plates 16 for four needle threads 17, thread guiding hooks 18, one for each of the cross threads 14 and the four needle threads 17, are also mounted on bracket 11.

A t 19 there is shown a lsecond set of thread guiding hooks mounted on thebridge portion 10,'one for each' of the. threads res pectively, from which hooks the four needle threads 17 pass lto thread guiding openings 20 (on the head of the machine, only 'a portion of which head is 'shown in Figs. 1 and 2j, thence through thread guiding openings 2 at the lower end of the needle bar to the four needlesl 22 respectively. The dotted line 23 in each of Figs. 1 and 2 indicates the approximate position of the upper surface of the throat plate of the machine, these two views, as before stated, showing the relative positions of the parts at diderent stages of the movement thereof in the stitchforming cycle.

rlhe parts thus far referred to in the detailed description are substantially the same in construction as corresponding parts in the said Merritt Patent No. 1,041,652, above mentioned.

25 is a horizontal take-up shaft suitably journaled in the frame-work of the machine. lt is shown in this particular instance as carrying a double take-up fixed upon the shaft by a set-screw 26. Une portion 27 of said take-up, between flanges, disks or plates 28 and 29, is adapted to act upon the cross thread 14, and the other portion 30 of said take-up, between the iianges or disks 29 and 31, is adapted to act upon the four needle threads 17. The threads pass over the take-up between the thread guiding hooks 18 and 19, before mentioned. The surface of the part 27 of the take-up which acts upon the cross-thread is cam-shape in outline and lpositioned eccentric to the shaft 25, as shown in dotted lines in Fig. 4. It is preferred to make the double take-up in three parts, one part comprising ianges or plates 28, 29 and 31 and cam 34, cast or formed in one piece, and having a hub adjacent plate 28 through which a screw 26 passes. Cam 34 is fixed and has a flattened surface 36. The second part of the double take-up is 'a' crescent-shaped member 32 which is U-shape on its inner face to engage a hub 33 and to allow of its withdrawal over hub 33, as clearly shownl in Figs. 3 and 4. r1`he outer edge of' the crescentshaped member 32 and that portion of the surface of the hub 33 between the ends of said member, present together a continuous ycam-like'surface adapted to act upon the cross-thread 14 with the necessary take-up action. A screw 50 passes loosely through plate 28, the arcfshaped slot 51 in crescent- Shapedmember 32, and engages a threaded j up comprises an adjustable extension 35 of the cam 34; said part 35 has a nose 39 at one end and a foot 39 at its other end contacting the flat face 36. A screw 3 7 countersunk in part 35 secures it to part 34. An adjusting screw 38 countersunk in a screwthreaded opening in the adjustable cam part 35 bears at its inner projecting end against the end of the surface 36 of part 34. When it is desired 'to adjust the take-up to give greater action upon the needle-threads, the set-screw 37 is first loosened and the adjusting screw 38 then turned to move the adjustable cam part 35 outwardly to the desired extent, and the set-screw 37 then again tightened.` To lessen the action of the take-up upon the needle-threads, this manipulation of the parts is reversed.

In conjunction with the take-up, there is provided for action upon the needle-threads a compensating spring 40 which is bent at one erid to fit a similarly shaped depression 41 (Fig. 5) ina flat surface 42 of the bracket 11, against which face the thread guide 15 seats and is held `by a screw 43 passing through opening 44 at the inner end of spring 40 and 1nto a screw-threaded opening 45 in the surface 42 of the bracket. The spring 40 extends downwardly and at its lower extremity has a right angled approximately horizontal extension 46 lying across the four needle-threa ds 17 between the guide hooks 18 and the take-up. This compensating spring acts to take up slack in the 'needle-threads, more particularly when theadjustable needle-thread take-up is moving from its position of maximum action on the.

threads to its during which threads.

position of minimum action, period 1t 1s releasing the In the position of the parts shown in Fi 1, the needles 22 are about to begin thelr ascendlng movement and the needle-thread 2, the needles 22 are at about the limit of their upward movement and the take-up 1s in its position of maximum action upon the threads.

What I claim is v 4 1 A rotary take-up having in its surface which contacts with the thread a fixed camlike part followed by an adjustable portion constituting a continuation of said cam-like art. p 2. A rotary take-up having in its surface which acts upon the thread, a fixed section and a movable section adjustable in its posi-A tion to increase or decrease the take-up action upon the thread one of said sections following the other as an approximate con tinuation thereof. j

3. A rotary take-up having yin its surface which acts upon the thread a fixed section and a movable section adjustable radially `to the axis of rotation to vary its take-up action upon the thread, one of said sections following the other as an approximate continuation thereof.

4. The combination of thread tensioning means; a rotary take-up for acting upon the thread after the latter has passed the thread tensioning means; and a take-up spring separate from the rotary take-up and acting on the thread at one side of sald rotary take-up.

5. The combination of thread tensioning means; a rotary take-'up for acting upon the thread after the latter'has passed the thread tensioning means; and a take-up spring separate from the rotary take-up and acting on the thread at one side of said 

